Eating within 8 hours may help keep the aging brain sharp - ScienceDaily

What the report says

ScienceDaily, citing material from the American Society for Nutrition, reported that a small six-month clinical trial found older women who limited eating to a shorter daily window showed modest gains on some cognitive tests compared with women who ate over a longer period. The findings were presented at NUTRITION 2026, held July 25-28 in National Harbor, Maryland, and should be considered preliminary because the abstract has not necessarily gone through full journal peer review.

The pilot study involved 47 women ages 50 to 79 with overweight or obesity who were enrolled in a weight-loss program. All participants were advised to reduce daily intake by 500 calories. Twenty-six were assigned to eat within less than nine hours a day, generally around 10 a.m. to 6 p.m., while the comparison group continued eating across roughly 12 hours.

After six months, both groups lost about the same amount of weight, averaging around 15 pounds. However, the time-restricted eating group performed better on tests of spatial planning and problem-solving. They also showed a non-significant trend toward fewer errors on memory and learning tasks, while no meaningful differences were reported for reaction time or multitasking.

The researchers said the results suggest meal timing could have effects beyond weight loss alone, but they emphasized the study’s small size. ScienceDaily noted possible mechanisms under investigation include circadian rhythms, inflammation, metabolic health and nutrient-sensing pathways. The findings matter because dementia risk rises with age, and women and people with overweight or obesity are among groups studied for elevated vulnerability.